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I'm using Windows 10 and today I accidentally hit the key combination: Ctrl+Shift+Win+B.

As a result, the screens went black for about a second and I heard a beep.

This is reproduceable; every time I hit the aforementioned key combination, the same behavior occurs.

Searching on the web I could find nothing about this except a reddit thread in which a user said he observed a similar behavior in Windows 8 by pressing Ctrl+Win+B (no Shift).

So, what is this key combination used for?

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This key sequence actually restarts you graphics driver.

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    I think that's it. After seeing your answer I found this: betanews.com/2016/11/14/how-to-restart-graphics-driver which confirms it. – Cristian Lupascu Nov 14 '16 at 12:54
  • If you have a Surface like I do, you probably also get to use this key combo every time you want to wake the machine from sleep... If you don't do this, the monitors refuse to come back on! – Brian Knoblauch Aug 28 '17 at 18:30
  • @GolfWolf ah - it says the key combo only works on Win 10. I confirm that on Win7 Pro it doesn't do anything. – bgmCoder May 4 '18 at 18:57
  • Can this be done with a console command too? – fritzmg Feb 14 '19 at 11:42
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    From a discussion with an AMD Radeon driver engineer, it does NOT restart the graphics driver. It does appear to discard the desktop surface buffer and re-create the allocation from DWM (on a healthy system the desktop goes black for a second). – kevinf Dec 5 '19 at 1:31
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Official from Microsoft: "Windows logo key + Ctrl + Shift + B = Wake PC from blank or black screen"

From a discussion with an AMD Radeon driver engineer, it does NOT restart the graphics driver. It does appear to discard the desktop surface buffer and re-create the allocation from DWM (on a healthy system the desktop goes black for a second).

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Have only found this one, please take a look:

Ctrl+Win+B -> Switch to the program that displayed a message in the notification area.

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  • Yes, I ran into that while searching. I even use Win+B occasionally (although not with the CTRL version). However, if I add shift on top of that I get the totally weird behavior I described in the question. – Cristian Lupascu Sep 23 '16 at 9:31
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    While not the best answer, spreading this handy tip is still useful. +1 – Rubellite Fae Aug 9 '19 at 2:24

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